4-Bromo-2,5-difluorobenzenesulphonyl chloride 207974-14-9, Information for 4-Bromo-2,5-difluorobenzenesulphonyl chloride 207974-14-9, Suppliers of United States 4-Bromo-2,5-difluorobenzenesulphonyl chloride 207974-14-9